In “Friends with Benefits,” characters played by Justin Timberlake and Mila Kunis have a lot of casual sex together. I predict the film makes $500 zillion.

Just kidding (mostly). But there's no denying these two ridiculously likable, sorta-kinda-good-looking blossoming movie stars are in very high demand. So much so that my 8-minute phone interview with them was squeezed into a Sunday night after their full day of press in L.A.

In the film Timberlake, 30, and Kunis, 27, play—oh, hell, you know what it’s about. The plot’s just like “No Strings Attached.”

“Friends with Benefits” revolves around sex. Better song for getting it on: TLC’s “Red Light Special” or R. Kelly’s “Bump ‘N Grind”?Mila Kunis: TLC!Justin Timberlake: Well, let’s break these down. I feel like if you’ve already worked out—MK: I say TLC. I’m sorry, I’m so sorry, sir. Please continue.JT: If you’ve already worked out how you feel about your sexual encounter, “Red Light Special” is probably going to be better. But if not, then the interlude to “Bump ‘n Grind” could be an amazing thing because if you think about it, my mind is telling me no.MK: There we go. There we go.JT: But my body’s telling me yes!MK: But don’t you think—JT: And you know what? I don’t want to hurt nobody!MK: Woo!JT: But there is something that I must confess to you. And you know what that is? I think you do.

Mila, you say TLC no matter what?MK: No, no, that’s not true. I think if you’re going to go with “Bump 'N Grind” you’re going to have like porno sex. And if you’re gonna go with “Red Light Special,” it’s not going to be as porno-y. It depends on what type of sex you want to have.JT: But you know what, even if my mind is telling me no, I’m just saying my body’s telling me yes.

Justin, you’ve said that some of “Friends with Benefits” touches on women’s lack of understanding about the different parts that men have. Who is more confused about the other’s parts: Men or women?JT: I would say that women are confused, and I would say that men are just not aware. [Laughs.] I don’t know. I’d say probably statistically, unfortunately, I’d say men are probably way more confused by a woman’s anatomy because it’s attached to a lot of emotion.MK: Well.JT: I think I just offended her.MK: I have left the room.JT: She just left.MK: I think that a woman is a much more complex human being and it takes a lot more to figure them out.JT: (singing) “My mind is telling me no!”MK: But if you can listen and pay attention and not argue, life would be simpler.

I’m talking to you from Chicago. What particular challenges face Chicagoans in a friends-with-benefits set-up?JT: Oh, you’re in Chicago? Oh. Well, let me just say if you have a friends with benefits in Chicago--everywhere you are actually—you gotta be safe. Particularly in Chicago, you don’t want to have a mistake by the lake.MK: [Laughs.]

How does one know if they have a mistake by the lake?MK: No glove, no love.JT: I just mean, you know, that before you attack her, cover your wacker.

But not everyone may do that. What happens if “Friends with Benefits” causes an overpopulation problem once people see it and want to get it on?MK: Wear a glove.JT: I’m going to jump in and say we can’t be responsible for …MK: Safe sex.JT: Yeah.MK: But be smart, children. I hope that your parents and/or your school taught you that.

Describe your co-star in the form of a haiku.MK: What’s a haiku’s number? 3-4-3?

5-7-5.JT: What is that, what?MK: 5 syllables, 7 syllables, 5 syllables.JT: Oh, God.MK: Jus-tin-is-JT: My-mind’s-tell-ing-me/no-but-my-bo-dy-tell-ing--MK: Tell-ing, that’s 7. And then 5 more.JT: Me yes.MK: I’m trying to think of lyrics to a song. I was going to start rapping Eazy-E for you, but I don’t think that would have been really good.

I don’t think that’s true.JT: Oh, thanks, man.MK: What are you not good at? Do we have to answer for each other?

Up to you.JT: Mila is …MK: Be nice.JT: Tone deaf.MK: That’s true.JT: But a redeeming thing about her is she doesn’t care. And she will belt a song at the top of her lungs.MK: Do you want me to do a rap for you? ... What’s Justin not good at? Where do I begin? … He doesn’t like crowds of people. He’s not the greatest at being in a large group of people.JT: I get nervous if I’m not controlling them.MK: Yeah. He likes to be in control.JT: I’m a control freak.

Does that speak to your plans for world domination, Justin?MK: We're like Pinky and the Brain. World domination, Pinky and the Brain-style. (singing) “Pinky and the Brain Brain Brain Brain Brain [cute noise that sounds like ‘bloop!’].”

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